... extrusion blown and casting polyamide film(CPA) is the useful Five layer co-extrusion blown and casting polyamide film(CPA) ... could with symmetry or asymmetry structure. The CPA series cover five tFive layer co-extrusion blown and casting polyamide film ( ... could with symmetry or asymmetry structure. The CPA series cover five types of products: Vacuumize package, Deep drawing, Lamination, Chemicals, ...